Oil & Gas Plant Engineers India Private Limited manufactures Liquid Petroleum Gas - LPG Propane Ammonia Fuel Oil Pumps. Oil & Gas Plant Engineers India Private Limited has received ISO 9001:2000 certifications. Liquid Petroleum Gas - LPG Propane Ammonia Fuel Oil Pumps are normally used for unloading product from tank lorry to storage tank as also for feeding the product for bottling plants or vaporization / LPG air mixing system. Liquid Petroleum Gas - LPG Propane Ammonia Fuel Oil Pumps are supplied for both unloading as well as transfer applications. The basic principal of these Pumps is `sliding vane technology`. The pumps being positive displacement design have an in-built relief valve.